AIM:To compare the efficacy of the coaxial micro incision 2.2mm and 2.8mm in the phacoemulsification.

METHODS:The selected 362 patients(362 eyes)with age-related cataract were randomly divided into 2.2mm group(211 cases with 211 eyes)and 2.8mm group(151 cases with 151 eyes)in our hospital from July 2014 to March 2015.The uncorrected visual acuity(UCVA), the best corrected visual acuity(BCVA), refractive state and corneal endothelium counting were recorded preoperatively. The ultrasonic energy and ultrasonic emulsification time during operations were also recorded. The UCVA, BCVA, refractive state were recorded postoperatively at 1d, 1wk, 1mo and corneal endothelium counting was also recorded at 1wk and 1mo after operations.

RESULTS:The UCVA and BCVA were significantly improved compared with those preoperative in both groups. At 1wk postoperatively, the UCVA of 2.2mm group was significantly better compared with that of 2.8mm group(P<0.05). The corneal astigmatism in the 2.2mm group was less than that in the 2.8mm group at 1wk postoperatively(P<0.05). The corneal endothelium counting of the two groups decreased in different degrees postoperatively, but there was no significant difference between the two groups(P>0.05). There were no statistical difference between the two groups on the ultrasonic energy and the ultrasonic emulsification time either(P>0.05).

CONCLUSION:With less injury, quicker recovery, better postoperative UCVA, small incision, coaxial 2.2mm micro incision phacoemulsification is a operation worth promotion.